Isaac anderson



(No Model.)

I. ANDERSON.

PIPE WRENCH.

No. 340,410. 3 Patented Apr 20, 1886.

INVENTOR imlanmn,

. ATTORNEYS WITNESSES v d/zaa; %)m/j/ UNITED STATES PATENT OFFICE.-

ISAAC ANDERSON, OF SAGINAW, MICHIGAN, ASSIGNOR OF ONE-HALF TO THOMAS A. PERROTT, SAME PLACE.

Pl PE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 340,410, dated April 20, 1886.

Application filed August 3, 1885.

To aZZ whom it may concern:

Be it known that I, ISAAC ANDERSON, a citizen of the United States, residing at Saginaw, in the county of Saginawand State of Michigan, have invented certain new and useful Improvements in Pipe-Wrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of this invention, 'and'is a side view, the handle being broken off. Fig. 2 is a vertical section, the handle being only partially in section. Fig. 3is a detail view in perspective. Fig. 4 is a detail view in perspective. Fig. 5 isalso a detail view in perspective.

Thisinvention has relation to pipe-wrenches; and it consists in the construction and novel arrangement of devices, all as hereinafter set forth, and pointed out in the appendedclaim.

In the accompanying drawings, the letter A designates the handle of the wrench, having a reversed cam-shaped arm, B, made concave in its bearing portion 0. The back of this arm is provided with a notch or hearing, D, to engage the transverse stop-pin E of the jaw-head F, which is pivoted to the handle at the junction of the arm B. This jaw-head F consists of the lateral parallel portions G G. which are connected by the pin E, and by the pivots H and I, the latter connecting the outer ends of said lateial portions. The general form of the head is concave from the handle,

Serial No. 173 429. (No model.)

formed, mainly, by the longer forward arms, L, 40

of the portions G. To the outer or forward ends of said arms is connected, by the pivot I, the curved jaw N, having the concave bearing m, toothed on its inner face, and provided with a guardarm, P, which plays between the lat- 4 era]. portions of the jaw-head.

In applying the wrench the curved jaw N is placed on the pipe and turned toward the handle, so that its back will engage the camarm of said handle, the pipe thus being 5Q grasped between said curved jaw and the concave bearing K of the jaw-head. By turning the handle in such a manner as to force the cam-arm upon the back' of the curved jaw N a firm purchase will be obtained on the 5 pips, whether it be of large or small diameter. By moving the handle in the opposite direction-the wrench can be easily detached.

Having described this invention, what I claim, and desire to secure by Letters Patent,

The handle having the cam-arm provided with the concave bearing 0 and the notch bearing D, Bht pivoted jaw head composed of the two parallel parts G G and having the 'stop. and the curved bitingjaw having the serrated bearing. and the guard-arm pivoted to the forward end of the said jaw-head, all combined to form a wrench, substantially as specified.

In testimony whereof I affix lily-signature in presence of two witnesses.

ISAAC ANDERSON. Witnesses:

D. A. PETTIBONE, F. A. KING. 

